Index Introduction The Research at Rijnhuizen Results in 2008 Education, Training, Outreach and Public Information Output Appendix website Rijnhuizen 2.4 | Plasma Surface Interaction Experimental Division: Fusion Physics Group leader: J. Rapp Senior scientists: W.R. Koppers, G.J. van Rooij Postdoc: G.M. Wright Graduate students: J. Westerhout, W. Vijvers, A. Shumack Undergraduates: R. ‘t Hoen, J. Biesheuvel Research engineer: H. van der Meiden Technicians: P.H.M. Smeets, B. de Groot, H. van Eck, S. Brons, R. Prins, O.G. Kruyt, J. Scholten, R. Al, T. Oyevaar, K. van der Geer Collaborators: R.A.H. Engeln, M.C.M van de Sanden, D.C. Schram (TU/e), D. Borodin, S. Brezinsek, J. Linke, A. Litnovsky, A. Pospieszczyk, V. Philipps, B. Schweer (FZ-Juelich, D), D.G. Whyte (MIT, USA), G. Popa, M.L Solomon, V. Anita (Cuza University, RO), R. Schrittwieser (University Innsbruck, A), F. Tabares, J. Ferreira (CIEMAT, E), S. Lisgo, G. DeTemmermans (UKAEA, UK), M. Mayer (IPP, D), E. Alves, L.C. Alves, N.P. Barradas (ITN, P) Funding*: FP-75, EFP, NWO-Groot, NWO-RFBR, EFDA Scientific programme With the FOM-programme ‘PSI-lab, an integrated laboratory on Plasma-Surface interaction’, Rijnhuizen is strongly expanding its research effort in the field of low temperature plasma physics, plasma surface interactions and material science. In this programme, the group PSI-E joins forces with the nSI and Surface-PSI groups, sharing the common physics as well as part of the analysis facilities. For the PSI-E group, the central experiment will be the high ion flux (>1024 m-2s-1), high power (10 MW/m2) linear steady-state plasma generator, Magnum-PSI operating in a magnetic field of 3 T (superconducting magnet). This experiment is unique in the world and is designed to reach the parameter range of a plasma in front of the high-flux plasma facing components of the next step fusion reactor ITER. This will allow the fundamental study of very pressing problems associated with the erosion of materials, near surface material transport and hydrogenic retention in materials. The extreme parameters will also considerably stretch the available parameter space for fundamental studies of the plasma physics, plasma chemistry, and plasma-surface interaction at high flux density. Numerical modelling, addressing the physics and chemistry of PSI, is an integral part of this research programme, providing the link with PSI research in present day tokamaks and ITER. This research program is being developed jointly with the TEC-partners. To prepare for this project, a pilot experiment has been set up in which the hydrogen plasma source is developed to the level that it can produce the fluxes given above. This experiment, called Pilot-PSI, is a collaborative research project with the Eindhoven University of Technology. A cascaded arc is used as the plasma source. The plasma beam in the Pilot-PSI device can be confined by a magnetic field of up to 1.6 T for short pulses. Diagnostics are being developed and tested at Pilot-PSI, which will be used later at the Magnum-PSI device.  Additionally, a dedicated R&D program on the RF heating of a low temperature plasma jet is being carried out on Pilot. In addition to the R&D program in support of Magnum-PSI, a research programme focusing on hydrogenic retention, chemical erosion, physics of the plasma jet and sheath physics is being carried out on Pilot-PSI. Figure 2.4: A deuterium plasma in Pilot-PSI, implanting deuterium nuclei in the tungsten target. * supported by the European Fusion Programme (EFP)